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Sinurda5Ka3winnielle
Sinurda5Ka3winnielle Sinurda5Ka3winnielle
  • 08-07-2016
  • Mathematics
Answered

what polynomial identity should be used to prove that 252 = (20 5)2?

Verified Answer :

HomertheGenius
HomertheGenius HomertheGenius
  • 14-07-2016

25² = ( 20 + 5 )² This is the square of a binomial:
( a + b )² = a² + 2 a b + b²
625 = 20² + 2 · 20 · 5 + 5²
625 = 400 + 200 + 25
625 = 625 ( correct )

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